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Fig. 3. Lift (blue) and drag (red) coefficients per wing during a two-winged fling
half-stroke are plotted for two mesh widths. The coarser grid (dotted line)
has a mesh width of about 8.33 x104 m (the same mesh
width as the other simulations in this paper), and the finer grid (solid line)
has a mesh width of about 4.17 x104 m. The two grid
sizes show good agreement with small deviations occurring during the
rotational part of fling.